Rotary brush cutter attachment



FIG. 1 is a top, front perspective view of a rotary brush cutter attachment showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, the opposite and adjacent sides being substantially similar in appearance to that shown; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a rotary brush cutter attachment, as shown and described. 